The book "Cell Engineering" offers a comprehensive analysis of the integration of advances in molecular biology into biotechnological processes. It is aimed at scientists and bioengineers who are involved in the modification of cell functions. The topics covered include gene expression, protein processing, secretion, glycosylation, immortality, proliferation, and apoptosis, among others. Additionally, it addresses the systematic investigation of the relationship between metabolic genotype and phenotype. The publication provides detailed methods for improving the cellular properties of cells used in the production of biopharmaceuticals, gene and cell therapies, as well as in tissue engineering. The content is based on presentations from the "European Workshop on Animal Cell Engineering" and includes contributions from leading experts in basic research and the biopharmaceutical industry.